Alafia River Minimum Flows and Levels - Southwest Florida Water ...
Alafia River Minimum Flows and Levels - Southwest Florida Water ... Alafia River Minimum Flows and Levels - Southwest Florida Water ...
when running two separate time series analyses. The first record used was for Buckhorn Springs flow only. This record was created by taking the difference between two gages, one just upstream and one just downstream of Buckhorn Springs. The record was then corrected for reported withdrawals to create a record of Buckhorn Spring discharges in the absence of withdrawals. Simulated reductions in flow of more than 15% indicated that habitat availability for largemouth bass adults and various life history stages and spawning activities of spotted sunfish would be reduced by more that 15% (Figure 5-13, Table 5-5). Habitat Gain/Loss for Largemouth Bass Adults evaluated for Buckhorn Springs 0% January February March April May June July August September October November December -5% -10% Habitat Gain/Loss -15% -20% -25% 10% Flow Reduction 20% Flow Reduction 30% Flow Reduction 40% Flow Reduction -30% -35% -40% Figure 5-13. Habitat Gain/Loss for adult largemouth bass associated with modeled flow reductions of 10-40% in Buckhorn Creek, based on Buckhorn Spring flows, downstream of Buckhorn Springs Main. Similar plots for other largemouth bass life history stages and other species are included in Appendix PHABSIM. 5-22
Table 5-5. Maximum monthly percent-of-flow reductions associated with less than a 15% reduction in habitat for various life history stages or activities of several fish species in Buckhorn Creek, based on Buckhorn Spring flows, downstream from Buckhorn Springs Main. Month Percent-Of- Fish Species Life History Stage or Activity Flow Reduction January 15% Spotted sunfish juveniles; Largemouth bass adults February 15% Spotted sunfish juveniles; Largemouth bass adults March 15% Spotted sunfish juveniles; Largemouth bass adults April 15% Spotted sunfish juveniles, spawning; Largemouth bass adults May 15% Spotted sunfish juveniles, fry, spawning; Largemouth bass adults June 15% Spotted sunfish juveniles, fry, spawning; Largemouth bass adults July 15% Spotted sunfish juveniles, spawning; Largemouth bass adults August 15% Spotted sunfish juveniles, spawning; Largemouth bass adults September 20% Spotted sunfish juveniles; Largemouth bass adults October 20% Spotted sunfish juveniles; Largemouth bass adults November 20% Spotted sunfish juveniles, spawning; Largemouth bass adults December 20% Spotted sunfish juveniles; Largemouth bass adults The second flow record used was for Buckhorn Creek flow only. This record was created by taking the gage record just downstream of Buckhorn Springs and correcting the flow for reported withdrawals. Simulated reductions in flow of more than 5% from July through October and 10% for the rest of the year, except of 20% in March, indicated that habitat availability for largemouth bass adults and various life history stages of spotted sunfish would be reduced by more that 15% (Figure 5-14, Table 5-6). 5-23
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Table 5-5. Maximum monthly percent-of-flow reductions associated with less than a 15%<br />
reduction in habitat for various life history stages or activities of several fish species in<br />
Buckhorn Creek, based on Buckhorn Spring flows, downstream from Buckhorn Springs<br />
Main.<br />
Month Percent-Of- Fish Species Life History Stage or Activity<br />
Flow<br />
Reduction<br />
January 15% Spotted sunfish juveniles; Largemouth bass adults<br />
February 15% Spotted sunfish juveniles; Largemouth bass adults<br />
March 15% Spotted sunfish juveniles; Largemouth bass adults<br />
April 15% Spotted sunfish juveniles, spawning; Largemouth bass adults<br />
May 15% Spotted sunfish juveniles, fry, spawning; Largemouth bass adults<br />
June 15% Spotted sunfish juveniles, fry, spawning; Largemouth bass adults<br />
July 15% Spotted sunfish juveniles, spawning; Largemouth bass adults<br />
August 15% Spotted sunfish juveniles, spawning; Largemouth bass adults<br />
September 20% Spotted sunfish juveniles; Largemouth bass adults<br />
October 20% Spotted sunfish juveniles; Largemouth bass adults<br />
November 20% Spotted sunfish juveniles, spawning; Largemouth bass adults<br />
December 20% Spotted sunfish juveniles; Largemouth bass adults<br />
The second flow record used was for Buckhorn Creek flow only. This record was<br />
created by taking the gage record just downstream of Buckhorn Springs <strong>and</strong><br />
correcting the flow for reported withdrawals. Simulated reductions in flow of<br />
more than 5% from July through October <strong>and</strong> 10% for the rest of the year, except<br />
of 20% in March, indicated that habitat availability for largemouth bass adults <strong>and</strong><br />
various life history stages of spotted sunfish would be reduced by more that 15%<br />
(Figure 5-14, Table 5-6).<br />
5-23
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